1322221 has 2 divisors, whose sum is σ = 1322222. Its totient is φ = 1322220.

The previous prime is 1322219. The next prime is 1322227. The reversal of 1322221 is 1222231.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 1240996 + 81225 = 1114^2 + 285^2 .

It is an emirp because it is prime and its reverse (1222231) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 1322221 - 2¹ = 1322219 is a prime.

Together with 1322219, it forms a pair of twin primes.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1322227) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 661110 + 661111.

It is an arithmetic number, because the mean of its divisors is an integer number (661111).

2^1322221 is an apocalyptic number.

It is an amenable number.

1322221 is a deficient number, since it is larger than the sum of its proper divisors (1).

1322221 is an equidigital number, since it uses as much as digits as its factorization.

1322221 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 48, while the sum is 13.

The square root of 1322221 is about 1149.8786892538. The cubic root of 1322221 is about 109.7576205915.

Adding to 1322221 its reverse (1222231), we get a palindrome (2544452).

The spelling of 1322221 in words is "one million, three hundred twenty-two thousand, two hundred twenty-one".